Consider it this way; a circuit structure is any type of diagram that illustrates the way the circuit functions where the principal objective is the appropriate wiring of elements and their connection to each other rather than physical location relative to one another or intending prototypes. Nevertheless, in some applications Assessing diagrams can be hard so consider this as overall advice. I've found this is especially true when dealing with more complex circuits and electronic equipment. I'm likely to work with a more straightforward but typical industrial circuit because these circuit set ups are exactly the same, but nevertheless where you can observe how each type of diagram indicates the purpose of the circuit in their own ways.
Here is another schematic diagram demonstrating precisely the identical circuit, connections and components and it appears different but they both fall into precisely the exact identical category.
Following is a version of a schematic diagram called a ladder structure. The most important intent of this diagram is to demonstrate the logic (speaking to electrical control) of a circuit board. This diagram is the one that I mainly encounter in my own line of work, and it is very effective for troubleshooting issues or learning the way the circuit works. Some circuits are so huge that most types of schematic diagrams need to be read in increments from novel form (typically with coded numbers so that info can be simpler found). Again, here is the same precise circuit since the first two weeks, but considering it in ladder form.
Much less mess, right? I've got enough information in each one of these diagrams to know just what this circuit will do and where to search for issues. Hope that this helps. ( Note: don't confuse lecture or circuit diagrams together with wiring diagrams; wiring diagrams will usually demonstrate pictures of elements such as the pictorial, and the way the whole or part of a circuit will be wired. The difference is that wiring diagrams usually place an emphasis on actual physical place of necessary components relative to each other that essentially tell a layman Just What to do about the wiring. )
Pictorial schematic diagrams, or graphic circuit diagrams are basically the exact identical thing with exactly the same function, however they use images of elements within the circuit instead of symbols. Again, here is the same exact circuit (almost except a control transformer was included and they are using conductors L1 and L3 rather than L1 and L2.
A design diagram refers to a particular kind of circuit structure that utilizes standard electrical/electronic symbols instead of images to show how a circuit (or a portion of it) functions. Below is a typical 3-wire motor controller circuit utilizing a normal short stop stop - start pushbutton station using a schematic diagram. (Momentary here means that the button/switch you activate will return to its default place once you let go of this, usually by a spring which compels the button/switch to do this.)